QCD Sum Rules are formulated by Shifman, Vainshtein and Zakharov in 1979 [1]} for mesons and generalized to baryons by Ioffe [2]} in 1981. It is one of the celebrated method among non-perturbative methods such as lattice QCD, AdS/QCD, Chiral Perturbation Theory etc. The method is based on the study of a suitable chosen correlation function in two different kinematical regions.
